diff --git a/Modules/Core/Common/include/itkIndex.h b/Modules/Core/Common/include/itkIndex.h
index 754bc27dbdb..ac5972f9a57 100644
--- a/Modules/Core/Common/include/itkIndex.h
+++ b/Modules/Core/Common/include/itkIndex.h
@@ -445,25 +445,25 @@ struct ITK_TEMPLATE_EXPORT Index final
     return m_InternalArray[pos];
   }
 
-  reference
+  constexpr reference
   front()
   {
     return *begin();
   }
 
-  const_reference
+  constexpr const_reference
   front() const
   {
     return *begin();
   }
 
-  reference
+  constexpr reference
   back()
   {
     return VDimension ? *(end() - 1) : *end();
   }
 
-  const_reference
+  constexpr const_reference
   back() const
   {
     return VDimension ? *(end() - 1) : *end();
diff --git a/Modules/Core/Common/include/itkOffset.h b/Modules/Core/Common/include/itkOffset.h
index 694bfff02a3..8df077f3a34 100644
--- a/Modules/Core/Common/include/itkOffset.h
+++ b/Modules/Core/Common/include/itkOffset.h
@@ -397,25 +397,25 @@ struct ITK_TEMPLATE_EXPORT Offset final
     return m_InternalArray[pos];
   }
 
-  reference
+  constexpr reference
   front()
   {
     return *begin();
   }
 
-  const_reference
+  constexpr const_reference
   front() const
   {
     return *begin();
   }
 
-  reference
+  constexpr reference
   back()
   {
     return VDimension ? *(end() - 1) : *end();
   }
 
-  const_reference
+  constexpr const_reference
   back() const
   {
     return VDimension ? *(end() - 1) : *end();
diff --git a/Modules/Core/Common/include/itkSize.h b/Modules/Core/Common/include/itkSize.h
index 2e6a60c8441..6e2cc398cff 100644
--- a/Modules/Core/Common/include/itkSize.h
+++ b/Modules/Core/Common/include/itkSize.h
@@ -369,25 +369,25 @@ struct ITK_TEMPLATE_EXPORT Size final
     return m_InternalArray[pos];
   }
 
-  reference
+  constexpr reference
   front()
   {
     return *begin();
   }
 
-  const_reference
+  constexpr const_reference
   front() const
   {
     return *begin();
   }
 
-  reference
+  constexpr reference
   back()
   {
     return VDimension ? *(end() - 1) : *end();
   }
 
-  const_reference
+  constexpr const_reference
   back() const
   {
     return VDimension ? *(end() - 1) : *end();
diff --git a/Modules/Core/Common/test/itkIndexGTest.cxx b/Modules/Core/Common/test/itkIndexGTest.cxx
index 23e4c4f7aa8..94cd17ec1d1 100644
--- a/Modules/Core/Common/test/itkIndexGTest.cxx
+++ b/Modules/Core/Common/test/itkIndexGTest.cxx
@@ -75,6 +75,10 @@ static_assert(itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk
                 itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Index<1>>(),
               "Check constexpr begin() and end() of Index.");
 
+static_assert(itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Index<>()) &&
+                itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Index<1>()),
+              "Check that `distance(&front, &back) + 1` is equal to `size`");
+
 
 // Tests that itk::Index::Filled(value) returns an itk::Index with the
 // specified value for each element.
diff --git a/Modules/Core/Common/test/itkOffsetGTest.cxx b/Modules/Core/Common/test/itkOffsetGTest.cxx
index c2367d4dd55..bd009f97e01 100644
--- a/Modules/Core/Common/test/itkOffsetGTest.cxx
+++ b/Modules/Core/Common/test/itkOffsetGTest.cxx
@@ -24,3 +24,7 @@
 static_assert(itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Offset<>>() &&
                 itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Offset<1>>(),
               "Check constexpr begin() and end() of Offset.");
+
+static_assert(itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Offset<>()) &&
+                itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Offset<1>()),
+              "Check that `distance(&front, &back) + 1` is equal to `size`");
diff --git a/Modules/Core/Common/test/itkRangeGTestUtilities.h b/Modules/Core/Common/test/itkRangeGTestUtilities.h
index 13c6029c54c..eba4558ac0c 100644
--- a/Modules/Core/Common/test/itkRangeGTestUtilities.h
+++ b/Modules/Core/Common/test/itkRangeGTestUtilities.h
@@ -156,6 +156,15 @@ class RangeGTestUtilities
   }
 
 
+  // Tells if `distance(&front, &back) + 1` is equal to `size`, for the specified container.
+  template <typename TContainer>
+  static constexpr bool
+  IsDistanceFromFrontToBackPlusOneEqualToSize(const TContainer & container)
+  {
+    return std::distance(&container.front(), &container.back()) + 1 == container.size();
+  }
+
+
   // Checks that each element of the specified range is zero.
   template <typename TRange>
   static void
diff --git a/Modules/Core/Common/test/itkSizeGTest.cxx b/Modules/Core/Common/test/itkSizeGTest.cxx
index c2af1b6429c..d6ba8a66b2c 100644
--- a/Modules/Core/Common/test/itkSizeGTest.cxx
+++ b/Modules/Core/Common/test/itkSizeGTest.cxx
@@ -85,6 +85,10 @@ static_assert(itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk
                 itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Size<1>>(),
               "Check constexpr begin() and end() of Size.");
 
+static_assert(itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Size<>()) &&
+                itk::RangeGTestUtilities::IsDistanceFromFrontToBackPlusOneEqualToSize(itk::Size<1>()),
+              "Check that `distance(&front, &back) + 1` is equal to `size`");
+
 
 // Tests that itk::Size::Filled(value) returns an itk::Size with the
 // specified value for each element.